how did you do your install? was the piston installed to the connecting rod when you installed the rings and then pushed down on the head to get everything together?
What I do is remove the piston to install the rings and get it seated on the head. i push the piston into the head just enough for the second ring to clear then i take the assembly and lower it onto the engine and line things up so I can install the connecting rod-wrist pin and c clips. no need for an extra set of hands or special tools.
Excellent idea Skyliner... that would also solve the problem.
It would also make it easier to follow Al.Fishermans advice and ALWAYS square up the rings in the empty cylinder to check for end gap clearances.
The clearances are all over the road on these little engines... MEASURE ALOT, CUT OR FILL AS NEEDED...
Ever try to use the crappy little gear puller they give you with the engine kits to remove the crank gear?
OF COURSE it stripped out!
I welded it to the gear to get it off and threw both in my draw, since a new crank gear costs like what?$ 5? its not worth trying to find a gear puller to fit under it to get it off with out cracking the cases.
I guess its just the 30 years or so of building big twins and hot four cyl. motorcycle engines out of good parts.
I kinda expect stuff to fit if it was ordered correctly...
BUT NOOOOOOOO... not with these little headaches...
I've found a machine shop that's got CNC capability, (and thats a little slow on business) and I'm going to hand them a brand new GT5R engine in pieces (cases, barrel and heads)
and have them copy it in billet aluminum with revised mounts and larger bolt holes.
I like the HT engine lay out, its perfect for a bicycle, in my opinion it just fits better than the Morini or those weed whacker looking 4 strokes, now we just have to build a better one, but the same external dimensions.
Any one interested?
I have to order at least 5 of them to get the machine shop to do it.
Thanks for all the advice...
BBB